@Brent, you're just regurgitating your Sunday school memes. At any point an 
experiment can turn up in which your cherished memes dont apply.
On Saturday, 3 May 2025 at 02:19:40 UTC+3 Brent Meeker wrote:

>
>
> On 5/1/2025 9:17 PM, Alan Grayson wrote:
> Yes, A is an operator, but it doesn't commute with H.  That would imply 
> the variable measured by A is constant in time.  The time per unit change 
> in the expected value of the variable is the inverse of [d<A>/dt].
>
>
> *What is d? *
>
> d/dt is the derivative operator.
>
>
> *Can you give one or two specific examples of A? I thought the HUP is 
> applicable only for non-computing operators. Am I mistaken? AG*
>
> "Non-communting"  That's right.  But any time varying variable fails to 
> commute with the Hamiltonian.
>
> Brent 
>

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